Improved machine fob dressing stoke



P. L. KING. MACHINE EOE DRESSING STONE.

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Letters Patent No. 89,286, elated July 28, 1868.

IMPROVED MACHINE FOR DRESSING STONE.

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I Be it known that I., FRANCIS L. KING, of the city and. county of Worcester, and State of Massachusetts,

have invented a'new and improved Machine for Dressing Stone; and I do hereby declareithab the following is a full, clear, and exact description of the construction and operation of the same, reference being had to the accompanying drawings, `and the lettersof reference marked thereon, making a part of this. specification, in which-'- j Figure l is a side elevation.

Figure 2 au end elevation. i

Figure 3 a. sectional eleration, taken on ther-ed line, (shown in fig. 2.) l

The object ci' my invention is, rst, to arrangethestone so as to compel them to dress each other to a plain, smooth, and even-surface, by the ossistan'ice1 of sand und water; second, by arranging the relative posi' tion of the upper and nether stones so as to produce the greatest celerity in grindmg, by the use of a small amount of motive-power, and a cheap und simplel arrangement of machinery to ploduce thisv result; third, a simple arrangement for pretcetingvthe bearings of. themaehinery unclervthe rotary/carriage from the sand-andwnter falling from` above; fourth, an improved self-adjusting frame. l To enable others skilledgin the art ,to make and use my invention, I will describe its construction and operation.

y The-entire machine should be made of' iron. The frame may bc made in any manner' convenient to furnish the necessary beur-ings, the rotary carriage A furnished with a, fixed or adjustable spindle, B, which passcsthrouglr thc disk and the gear I"4 into' the step G, the bearing in the disk E holding theicarriage in position and allowingarotury motion to be imparted.

The principal wcightof t he'carriage is sustained by the trucks C C. 'lhe` carriage Als furnished with thev apron ILwvliich shuts downtovcr the curbing-I, for the purpose of protecting the machinery from matter falling from above. The pou-er is `'.tppliei to the shaft K, and, by means of the bevel-gears F and Lfa. rota-ry motion is imparted to the carriage A. Over the carriage A is placed the` rotary grinder-bex M, which holdsthe upper stone, and is held in position by the shaft N, to which it is fixed by the set-screw O. i The grinder-box is made` the sume size of the cari-inge A, but is set alittle one side of the centre of' the carriage.

The stoncs are adjusted in the rotary grinder-box so as to leave a hollow space-in the centre. The cer- :inge is filled with one or more stones of equal height. The stone in the grinder-box rests upon the stone in the carriage. The power being applied to the carriage, the friction rotates the grinder-box. Thus an eccentric rindine ower is reduced. At the seme time sand and water ure fed into the o en s ace Pin the rinder-box f g e P P i P P g i through the hopper R and hollowshaft N, ortheir equivalent. 'Power may also be' applied to the shaft N, if

convenient, and the grinder-box rotated .in a. direction opposite to the motion of the carriage. By applyingpower in one or both ways, an eccentric motion is produced, thus preventing any hard or flinty places .in the upper or nether stones, grooviug the stone with which it comes in Contact. y

The self-adjusting frame S furnishes a'bearing to the shaft N, to prevent vibration. It slides up andl down in the groored rack T T, so as to'nccommoilute itseli` to the dilferent thicknesses of stone to be dressed, and compensate i'or the reduction of the stone as it wears away. y

The projecting arms at each end, sliding iu'the grooved racks, prevent the frame from turning or canting.

By means oi' the shaft V, whichpasses through the hearings a a', (shown on lig. 1,) and the goers U, at each end, working in the rack T '.l,-the ratchet-wheel Y and the set-screw 11, (shown on iig. 3,) working in the 'grooveV e in the Shaft N, the frame S, with thegrinder M und the shaft N, may be raised and lowered :it will.

The Shaft V and gears U und racks T'serve also to hold the freine S accurately in a level position.

What I claim as my invention, and jdesire to secure by Letters Patent, is- A L`The peculiar construction of the self-adjusting frame,"with its Shaft, gears, grooved racks, andset-screw B, when constructed and'operating substantially as and for the purpose specified.

2. The carriage A, spindle B, or its equiralentyapron Hconstructed and operating substantiallyas and for the purpose specified. l'

3. The trucks CC, disk E, and curb I, constructed and yoperating substantially as and for the purpose specified. 4

4. Gears F and L, shaft K, constructed and operating 'substantially as and for the purpose specified.

5. The peculiar relative positions or adjustment ofv the carriage A and grinders M upon different centres, whereby the irregular or eccentric motion is produced, arrangedand operating substantially as and for the purpose specified.

6. The combination of the hopper R, hollow shaft N, the grinder-box M with the carriage A, with its various bearings, constructed and operating substantially asl and for the purpose/specified.

. FRANCIS L. KING. Witnesses: l'

lHENRYy CHMSIN,

RUSSEL R. Mclmn. 

